The Ottoman Empire became one of the most important powers in world history, particularly through its achievements in naval affairs. While carrying out great conquests on land, the Ottomans also began to control trade routes thanks to the supremacy they established in the Mediterranean. With the strengthening of the Ottoman navy, a long-lasting dominance was established in the Mediterranean.
The frequently asked history question “When did the Mediterranean become a Turkish lake?” is associated with one of the most important events in Ottoman naval history: the Battle of Preveza.
When Did the Mediterranean Become a Turkish Lake?
The Mediterranean became a Turkish lake after the Battle of Preveza, won in 1538.
In this battle, the Ottoman navy inflicted a major defeat on the Crusader fleet. After the victory, the Ottoman Empire secured great supremacy in the Mediterranean.
For this reason, historical sources use the expression:
“The Mediterranean became a Turkish lake”
to describe this period.
What Is the Battle of Preveza?
The Battle of Preveza was a great naval battle fought between the Ottoman Empire and the Crusader fleet.
The battle:
- Took place on 28 September 1538
- Was fought off the coast of Preveza
- Ended in a decisive Ottoman naval victory
This battle is regarded as one of the most significant achievements in Ottoman naval history.
Who Won the Battle of Preveza?
The Battle of Preveza was won by the Ottoman Empire.
Leading the Ottoman navy was:
Barbaros Hayreddin Pasha
who commanded the fleet.
Barbaros Hayreddin Pasha’s naval expertise and battle tactics played a major role in the Ottoman victory.
Who Was Barbaros Hayreddin Pasha?
Barbaros Hayreddin Pasha is one of the most important Grand Admirals (Kapudan-ı Derya) in Ottoman history.
Barbaros:
- Achieved great victories in the Mediterranean
- Strengthened the Ottoman navy
- Protected maritime trade routes
- Established supremacy over European fleets
During the reign of Suleiman the Magnificent, Ottoman naval power developed significantly.
Results of the Battle of Preveza
The results of the Battle of Preveza were highly significant for the Ottomans.
Following the victory:
- The Ottomans gained supremacy in the Mediterranean
- The power of the Crusader fleets weakened
- Ottoman influence over maritime trade routes increased
- Ottoman dominance in North Africa was strengthened
These developments increased the Ottoman Empire’s power in world politics.
Why Was the Mediterranean Important?
The importance of the Mediterranean has been immense throughout history in terms of trade routes.
The Mediterranean:
- Provided the connection between Europe and Asia
- Served as a passage point for merchant ships
- Enriched port cities
- Made naval dominance strategically important
For this reason, great powers sought to establish supremacy in the Mediterranean.
Ottoman Naval Power
Ottoman naval history saw major development, particularly during the reign of Suleiman the Magnificent.
The Ottoman navy:
- Became dominant in the Mediterranean
- Extended its reach to North Africa
- Achieved success against European fleets
- Controlled maritime trade routes
Barbaros Hayreddin Pasha was one of the most important figures in this process.

The Struggle Between the Ottoman and Crusader Fleets
The Ottoman-Crusader naval battles carried great importance in terms of Mediterranean dominance.
The Crusader fleet:
- Venice
- Spain
- The Papal States
- Genoa
was formed through the alliance of these and other powers.
However, the Ottoman navy prevailed at Preveza.
When Did the Mediterranean Become a Turkish Lake?
The answer to the question “When did the Mediterranean become a Turkish lake?” is the Battle of Preveza, won in 1538. With the Ottoman navy’s defeat of the Crusader forces, Ottoman supremacy in the Mediterranean began.
This victory is regarded as one of the most important events in Ottoman naval history and is closely identified with the name of Barbaros Hayreddin Pasha.









